calibre is a free and open source e-book library management application
developed by users of e-books for users of e-books. It has a cornucopia
of features divided into the following main categories:

 * Library management
 * E-book conversion
 * Syncing to e-book reader devices
   (note, no direct USB/MTP access in the OpenBSD package)
 * Downloading news from websites/RSS feeds and converting into e-book form
 * Comprehensive e-book viewer
 * Content server for online access to your book collection
 * E-book editor for the major e-book formats
